Reverse mechanism for hoisting devices.



N0.- vsoyzss. I AT NTED JAN. 24,'19.05.

V A. M. SMITH. REVERSE MECHANISM FOR HOISTING DEVICES.

APPLIOATION FILED 0053.15, 1903. REN EWED NOV. 2. 1904.

' UNITED STATES ADAM M. SMITH, OF DIXON, ILLINOIS, ASSIGNOR OF ONE-HALFTO Patented January 24, 1905.

PATENT OFFTCE.

ADAM

S. DUN LAP, OF DIXON, ILLINOIS.

REVERSE MECHANISM FOR HOISTING DEVICES.

SPECIFICATION forming part of Letters Patent No. 780,733, dated January24, 1905.

Application filed October 15, 1903. Renewed November 2,1904. Serial No.231.112.

To aZZjwhom it may concern:

Be it known that I, ADAM M. SMITH, a citizen of the United States,residing at Dixon, in

My invention has reference to reverse mechanism for hoisting devices,and relates specially to that class of such devices wherein twoelevators are alternately raised and lowered by the use of one cable.

By the use of my invention it is possible to have the power appliedcontinuously and in the same direction, as is desirable in machines ofthis class, such power-being applied to the operating-cable of thehoisting device in either direction at will by means of said invention,as will more fully appear in the following specification thereof.

In the drawings, Figure 1 is a plan view of my device. Fig. 2 is avertical section thereof in the line w w of Fig. 1 looking in thedirection of the operating-cable. Fig. 3 is a similar view looking inthe contrary direction. Fig.. 4 is a detail showing the brakeoperatingmechanism.

1 is the frame of the machine, inwhich is journaled. the main shaft 2,having on one end a pulley 3, suitably operated by a belt 4. J ournaiedin the frame 1, parallel with the shaft 2 and in the same horizontalplane therewith, is a shaft 5, on the outer end of which is fixed thecable-pulley 6. On the shaft 2 are fixed two similar gear-wheels 7 and8, and on the shaft 5 are loosely supported two similar gear-wheels 9and 10, the wheel 10 meshing with the wheel 8 on the shaft 2. On a shortshaft 11 in the frame 1 is loosely supported a broad gearwheel 12,meshing at all times with both of the wheels 7 and 9. It will be seenthat by this construction by the operation of the shaft 2 all of saidgear-wheels will be caused to rotate,

but the wheels 9 and 10 in opposite directions. The inner faces of thewheels 9 and 10 are pro.- vided with clutches 13 and 14, adapted toindependently engage a double clutch 15, feathered on the shaft 5, so asto move longitudinally thereof. The clutch 15 is provicledwith anannular groove 16, engaged by pins in a yoke 17 on the end of a lever18, fulcrumed,

as at a, on a cross-piece 19, secured on the frame 1. On the under sideof the lever 18 is a rod 20, having at its lower end a springactuatedcatch 21, engaging a recess22 in the cross piece. 19. When thus engaged,the clutch 16 is held centrally of the gears 9 and 10, and neither ofsuch gears is in contact therewith. By releasing the catch and operatingthe lever 18 the clutch 15 can be thrown into engagement with one orother of the wheels 9 and 10, as desired, whereby the shaft 5 is causedto rotate in one or the other direction.

Between the frame 1 and the cable-pulley 6 is interposed a lever 23,pivoted to the frame, as at 6. Supported in such lever so as to encirclethe shaft 5 is a collar 24, havingits outer face convexed to correspondwith a concave depression in the inner face of the hub of the wheel 6.(Shown in dotted lines.)

is a cam secured on the frame 1 and connected with the. lever 18 bymeans of a rod 26. The free end of the lever 23 is in contact with theperiphery of the cam 25, which is of such conformation that when thelever 18 is centrally locked the collar 24 is forced into contact withthe hub of the wheel 6, such wheel being held from movement by thefriction thereof. When the lever 18 is thrown to either side, it causesa movement of the cam 25, bringing opposite the end of the lever 23an'offset in the edge of the cam, which permits a release of the collar24 and wheel 6.

27 represents a small section of a cable, one end of which runs upwardlyover a pulley and is secured to one elevator and the other end of whichextends similarly over another pulley to another elevator. (N otshown.)When one of the elevators is loaded and ready to be hoisted, the clutch15 is thrown into engagement with the proper gear on the shaft 5 and theelevator ascends. At the same time the other elevator descends, and whenit reaches the ground the clutch 15 is disengaged. When the elevatorsare again ready to be moved, the clutch is thrown into engagement withthe other gear on the shaft 5 and the movement of such shaftand of thecable 27 is reversed. It will be seen that by this means the movement ofthe shaft 5 can be repeatedly reversed and the elevators repeatedlyraised and lowered. When a loaded elevator is raised to the desiredheight and the clutch 15 locked in central position, as shown in Fig. 1,there is danger of such loaded elevator again descending to the bottom.It is to prevent any such contingency thatI provide the brake deviceabove set forth, which, as has been heretofore stated, is in operationwhenever the clutch is so centrally located and out of engagement withthe gears.

I do not wish to be understood as limiting the use of my device to theparticular mechanism herein set forth, as the same may be found to bespecially adapted to use in connection with other devices wherein areversal of the mechanism is to be desired or necessary.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, is-

1. In mechanism of the class named, the combination of the shaft 5; thepulley 6, fixed thereon; the clutch 15, secured on the shaft 5 so as tomove longitudinally thereof; the suitably-mounted lever 18, engaging theclutch 15; the lever 23, having a collar 24, adapted to engage the hubof the wheel 6; the cam 25, secured on the frame 1, and engaged by thelever 23; the rod 26, connecting such cam with the lever 18, and meansfor reversing the direction of rotation of the shaft 5 in conjunctionwith the operation of the clutch 15, substantially as described.

2. In mechanism of the class named, the combination of the rotary shaft5; the hoistingpulley 6, fixed thereon; the clutch-gears 9 and 10,spaced apart on the shaft 5, and adapted to rotate freely thereon; theclutch 15, normally out of engagement with the gears 9 and 10; the lever23, adapted to engage the pulley 6; the cam 25, holding the lever 23normally in engagement with the pulley 6; means for rotating the gears 9and 10 in contrary directions, and means for causing the clutch toengage one or other of the gears 9 and 10, and simultaneously operatethe cam to release the lever 23 from contact with the pulley 6,substantially as shown.

3. In mechanism of the class named,the combination of the rotary shaft5; the pulley (5, fixed thereon; the clutch 15, secured on the shaft 5,so as to move longitudinally thereof; the suitably-mounted lever 18,engaging the clutch 15; the lever 23, adapted to engage the pulley 6;the cam 25, secured to the frame, and engaging the lever 23; the rod 26,connecting such cam with the lever 18; means for reversing the directionof rotation of the shaft 5 in conjunction with the operation of theclutch 15; and means for locking the lever 18 in position to hold theclutch 15 from engagement with the mechanism for actuating the shaft 5,and coineidently therewith hold the lever 23 in contact with the pulley6, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

ADAM M. SMITH.

Witnesses:

W. H. SMITH, W. P. PALMER.

